User Manual

Appendix C Hayes AT Command Reference
RFI-9256 Radio Modem User Manual Page 76 of 96
ATI0
Displays the numeric identify code (UNIRADIO PnP).
ATI1
Displays the CRC-32 firmware checksum.
ATI2
Returns OK if the firmware checksum is correct, or ERROR if the firmware checksum is
invalid.
ATI3
Displays the firmware revision level.
ATI4
Displays the firmware revision / build date.
ATI5
Displays the radio manufacture date.
ATI6
Displays the radio serial number.
ATI7
Displays the mode identification string.
ATI8
Displays the connection type.
ATI9
Displays the internal temperature of the radio in degrees C.
ATI10
Displays the offline time in milliseconds.
ATI11
Displays the radios average RSSI in dBm.
ATI12
Displays the radios average NOISE in dBm.
ATI13
Displays the current port identifier (0 for main, 1 for aux, or 2 for a virtual Hayes dial-up
port).
ATI14
Displays the radio link status.
Table 23: ATI information commands
C.1.6 “ATO” Return to Online State
The return to online state command returns the radio to online state from local command state.
When a radio is online (connected to a remote computer), anything transmitted over the serial port is sent to
the remote unit. In order to send AT commands to the radio, it must be returned to local command state. This
is done by sending an escape sequence (see section Escape Sequence on page 27). In order to go back online
state from the local command state, the ATO command is executed.
C.1.7 “ATQ” Quiet (Suppress Response Codes)
The response codes that are generated by the radio can be suppressed, so that commands do not return OK ,
CONNECT , or NO CARRIER . The options for generating response codes are shown in Table 24.
Command Description
ATQ0
Response codes are always generated.
ATQ1
Response codes are not generated.